Firedoor construction for stokers



FIREDOOR CONSTRUCTION FOR STOKERS Filed oc'z. 18,' 1933"'11111111Illlllfllllllllllll/lllllll INVENTOR.

ATTORNEY.

Patented Sept. 4, 1934 UNITED sTATVEs 1,972,834 FIREDOOR CONSTRUCT ONFOR STOKERS Charles J. Surdy, Tuckahoe, N. Y., assignorto The StandardStoker Company, Incorporated,

a corporation of Delaware Application October 18, 1933, Serial No.694,019 7 olaims. (cl.A 110 101) My invention relates to improvements infiredoor construction usedin connection with stokers which feed throughthe handfiring opening of a furnace.

In stokers which feed through the usual handfiring opening of a furnace,the upper end of the stoker discharge conduit constitutes Va frame forsupporting the firedoor. The firedoor frame embraces the firing openingand extends rearwardly from the furnace wall adistance sunicient tosurmount the upper end of the stoker discharge conduit. In certaininstances the firedoor frame extends rearward of the firing opening inthe furnace wall a distance such that a long tunnel is formed throughwhich access into the furnace is gained. is such that it is necessaryfor the fireman to use a hook or a rake for the purpose of breaking up01' removing a clinker, or to make other adjustinents in the firebed,considerableidifliculties are experienced in performing these duties.These difculties are present especially when it is necessary to reachthe corners of the furnace immediately at each side of the firedooropening.

It is the object of this invention to obviate these difliculties in asimple and efficient manner by the provlsion of supplemental orauxiliary doors, one in each side wall of the firedoor frame, as will beapparent from the following description when it is read in connectionwith the drawing which illustrate the invention adapted for use with alocomotive stoker, and in which Figure 1 is a side elevational view ofthe stoker embodying my invention with the locomotive furnace insection,

Figure 2 is a rear elevational view of the structure shown in Figure 1,with portions removed and others in section, and

Fgure 3 is a sectional view taken on the line 3-3 of Figure 2 with oneof the auxiliary doors opened.

On the drawng, 10 represents the locomotive, 11 the furnace 01' fireboxthereof and 12 the backwall which has a firing opening 13 therethrough.

At 14 I have generally indicated a stoker which includes a dischargecondut 15, in communication with the firing opening through the upwardlyopenIng mouth 16. A flange 17 is formed with the discharge conduit 15and bolts 18 passing through the flange form the means for securing theconduit to the backwall 12. If found necessary, a bracket such as 19 maysupport the conduit 15 from the furnace mud ring 20.

Surmounting the mouth 16 of the conduit 15 is a frame 21, which embracesthat portion of the When the condition of the fire firing opening 13immediately` above the mouth 12. If desirable, the frame 21 couldbeformed in,-

tegrally` with conduit 15 and inV `this case vthe fiange 22 would.thenlbe an upward continuation of the flange 17. A firedoor 24 isoperatively mounted on the frame 21 Aat that end thereof remote from theflange 22 and preferahly` directly opposite the firing opening .13.Z Itis necessarythat the fuel, as it iszurged through the conduitV 15.by thescrew 25, bevdelivered to-the distributing means 26 in afree and looseform)l In orderfto ac-4 complish this result, the conduit mouthrl is ofsubstantial'proportiona such ,that the frame21I necessarily extendsrearward Zof thebackwall 12 a considerahle distance. rThefrarne 21forms, in effect, atunnel 27 throughmhich access into the firebox 11 isgained.

In certain instances, .this tunnel formation has been found to beolojectiornableV because the rear Corners of, the firebox are notwithinreach of the firemans hook or rake whenever it is necessaryto remove andbreak up clinkers, or, to smooth out a bank in the fire at'these points.By-my present invention :IobViate Vthese difficulties .in a very simpleand efficient .mannen At leach sidewall 28 of the frame 21, I haveformed a recess such as 29, extending from the rearward edge 30 of theframe toward the flange 22. Each of these recesses 29 is normally closedby an auxiliary door 31 which is hinged to the frame 21 as at 32. Ihinge these auxiliary doors to the frame at their 'lower ends and employeccentric latches 33 at their upper ends to retain the doors in theirclosed position. Lugs 34, formed with the doors 31 engage the frame 21and prevent movement of the doors into the tunnel 27. By hinging theauxiliary doors at their lower ends, no added means is necessary to keepthese doors in their opened position.

When the locomotive is in normal operation, the firedoor 24 is closedand the stoker 14 feeds fuel to the distributing means 26 for projectionover the fire by fiuid means. However, when a bank or clinker `forms ineither rear corner of the firebox, the firedoor 24 is opened and theproper auxiliary door 31 is also swung open. The fireman then passes ahook or rake 35 through the tunnel 17 and the firing opening 13 andeither smooths out the bank or removes or breaks up the clinkers. Itwill be observed from Figure 3 that the recesses 29 permit the rake orhook 35 to be V said recesses.

angled'closely to the backwall 12 and thus the rear corners of thefirebox are easily reached.

From the foregoing, it is apparent that I have devised a simple and ahighly advantageous construction for use in connection With furnacefiredoors.

1. In combination, a furnace having a Wall with a firing openingtherein, a frame secured to said furnace wall, said frame having wallswhich eX- tend rearwardly from said furnace wall, the rear edges of saidWalls defining an opening opposite said firing opening, at least one ofVsaid walls being provided with a recess extending from the rear edge ofsuch wall toward the furnace Wall, a

firedoor supported from said framev and (':losingV the opening definedby the rear edges of said Walls, and an auxiliary door closing saidrecesvs.

2. In combination, a furnace having a wall With a firing openingtherein, a frame secured toisaid furnace wall, said frame having wallswhich extend rearwardly from said furnace wall, the rear edges of saidwalls defining an opening opposite said firing opening, opposite Wallsof lsaidframe being .provided each with la recess extending from therear edge of such wall toward the furnace wall, a firedoor supportedfrom said frame and closing the opening defined by the rear edges'ofsaid walls, and an auxiliary door closing each of 3. In combination, afurnace having a wall with av firing opening therein, a frame secured tosaid furnace wall, said frame having walls which extend rearwardly fromsaid furnace wall, the rearf .edges of said wallslying in a common planeandl 'defining an opening oppositesaid firing opening,

atleast one`of said walls being provided With'a recess extending fromthe rear edge'of 'such wall j toward the furnace wall, a firedoorsupported from said frame and closing the opening defined by the' rearedges of said walls, and an auxiliary door closing said recess.

4. In combination, a furnace having a wall with a firing openingtherein, 'a frame secured to said furnace wall, said frame having wallswhich extend rearwardly from said furnace wall, the rear edges lof saidwalls lying in a common plane and defining an opening opposite saidfiring opening,

opposite walls of said frame-being provided each withva recess extendingfrom the rear edgeof such wall toward the furnace wall, a firedoorsupported from said frame and closng the opening defined by the rearedges of said walls, and an auxiliary dooi` closing each of saidrecesses.

5. In combination with a locomotive firebox having a backwall with afiring opening therein, a stoker discharge conduit arranged to feedthrough said firing'opening, said dis'charge conduit includingan'upwardly opening mouth, a frame embracing said firing opening andforming ,an upward extension of said stoker discharge fconduit, saidframe having walls, including side walls, extending `rearwardly fromsaid backwall,

the rearredges of such walls defining an opening opposite said firingopening, each of the side Walls being provided with a recess extendingfrom the :rear edges of said'walls toward the backwall, a

firedoor supported from said frame and closing the opening defined bythe rear edges of the walls,`

with` a recess extending from therear edges of said Walls toward thebackwallya'firedoor supported from said Vframe and closing the openingdefined by the rear edges of thcrwallavand an auzililfy'door closingtheV recess'ineach side Wall.

' 7. In combination, a furnace having a Wail With afir'i'ngopeningtherein, a frame secured to-saidl; furnace' wall,` said frame havingWalls which extend rearwardly from said vfurnace wall, vthe rear- Wardedge portions of said walls defining an opening opposite said firingopening, at least one of said walls being provided Vwith are'cessvextending from the rear edgeV o-fy such wall toward the furnace wailand a movable door 'covering said recess.

CHARLES J SURDY.

Mili

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